Dear hackers, I made another WIP patchset to mmap WAL segments as WAL buffers. Note that this is not a non-volatile WAL buffer patchset but its competitor. I am measuring and analyzing the performance of this patchset to compare with my N.V.WAL buffer.
Please wait for a several more days for the result report... Best regards, Takashi -- Takashi Menjo <takashi.menjou...@hco.ntt.co.jp> NTT Software Innovation Center > -----Original Message----- > From: Robert Haas <robertmh...@gmail.com> > Sent: Wednesday, January 29, 2020 6:00 AM > To: Takashi Menjo <takashi.menjou...@hco.ntt.co.jp> > Cc: Heikki Linnakangas <hlinn...@iki.fi>; pgsql-hack...@postgresql.org > Subject: Re: [PoC] Non-volatile WAL buffer > > On Tue, Jan 28, 2020 at 3:28 AM Takashi Menjo > <takashi.menjou...@hco.ntt.co.jp> wrote: > > I think our concerns are roughly classified into two: > > > > (1) Performance > > (2) Consistency > > > > And your "different concern" is rather into (2), I think. > > Actually, I think it was mostly a performance concern (writes triggering lots > of reading) but there might be a > consistency issue as well. > > -- > Robert Haas > EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
0001-Preallocate-more-WAL-segments.patch
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0002-Use-WAL-segments-as-WAL-buffers.patch
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0003-Lazy-unmap-WAL-segments.patch
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0004-Speculative-map-WAL-segments.patch
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0005-Allocate-WAL-segments-to-utilize-hugepage.patch
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